Freeport-McMoRan Morenci, Inc.; Permit #42474 1 September 8, 2008 Technical Support Document
TECHNICAL REVIEW AND EVALUATION OF APPLICATION FOR
AIR QUALITY PERMIT #42474
I. INTRODUCTION This is a renewal permit for operation of the Morenci mine by Freeport-McMoRan Morenci, Inc. (FMMI). This is a stationary facility located at 4521 U.S. Highway 191 in Morenci, Greenlee County, Arizona. This is a renewal of operating permit #M110734P1-99.
Company Information: Facility Name: Morenci Mine Mailing/Facility Address: 4521 U.S. Hwy 191, Morenci, Greenlee County
AZ 85540-9795.
II. FACILITY/PROCESS DESCRIPTION
A. Process Description
The major operations at FMMI facility include an open-pit mine, three in–pit crushers, ore conveyors, the Morenci copper ore concentrator, the Metcalf mine for leach (MFL) plant, copper solution extraction & electro winning (SX/EW) plants, and copper powder plant. The supporting operations of the facility are the lime slaking plant, the concrete batch plant, the concentrate leach plant, and the Metcalf combined cycle power plant. Please refer to application for detailed discussion about the processes.
B. Air Pollution Control Equipment
For controlling emissions of particulate matter (PM), particulate matter below 10 micron size (PM10), and volatile organic compounds (VOCs), the Permittee uses wet scrubbers, fabric filter dust collectors (FFDC), baghouses, bag collectors, and water spray systems at various emission points.
III. EMISSIONS A. Facility wide Emissions
FMMI is a major source for purposes of Title V because potential emissions of PM10, PM, and NOx exceed 100 tpy. Facility wide emissions are listed in Table 1. In order to stay a synthetic minor source for purposes of the Federal New Source program, the source is accepting various air pollution control requirements like wet scrubbers, fabric filter dust collectors (FFDC), and water spray systems for controlling emissions of particulate matter.
Freeport-McMoRan Morenci, Inc.; Permit #42474 2 September 8, 2008 Technical Support Document
Table 1- Facility wide Emissions
Pollutant Potential to Emit
Tons per year NOx 231.32 CO 92.64 SO2 0.81
VOC 41.18 PM 188.45
PM10 173.32
B. SOURCE WITHIN A SOURCE
FMMI is currently a major source under both the Title V and Prevention of Significant Deterioration (PSD) definitions of “major source”. Through this renewal permit application, the Permittee has accepted new permit limits that will result in the FMMI’s facility remaining a Class I (Title V) major source and becoming a PSD “synthetic minor” source.
The definition of “Major Source” in A.A.C. R 18-2-401(9) states that the PSD major source threshold is 100 tons per year for a source classified as a categorical source and 250 tons per year for a source not classified as a categorical source. The list of categorical sources, A.A.C. R 18-2-401(2), does not include copper mining or other types of metal mining. Thus for FMMI’s overall operation, the PSD major source threshold is 250 tons per year. For supporting the processing of ore at Morenci, FMMI has fossil-fuel-fired steam boilers and combined cycle gas turbines of more than 250 million Btu per hour heat input at their facility. Since these support facilities are a listed categorical source, the PSD threshold for them is 100 tons per year. With the establishment of voluntarily accepted emission limitations, FMMI’s facility-wide emissions will not exceed 250 tons per year. Consequently, the FMMI’s facility as a whole is not considered a PSD “major source”. The fossil-fuel-fired steam electric plants (Boiler and power producing steam turbine generator) have PTE for all criteria pollutants below 100 tons per year. Consequently, it will not be considered as a PSD “major source”. Since the potential to emit for NOx is greater than 100 tons per year for the Combined Cycle Power Plant (CCPP) considered alone, it will be considered a PSD “major source”. Any future change at the CCCP with a net emissions increase above significant levels will trigger a major modification under the PSD program.
IV. COMPLIANCE HISTORY
There are no air quality cases associated with this facility. There have been 42 facility inspections with six physical facility inspections, 17 performance tests, and 19 records reviews in the past five years.
Freeport-McMoRan Morenci, Inc.; Permit #42474 3 September 8, 2008 Technical Support Document
V. APPLICABLE REGULATIONS
Table 2: VERIFICATION OF APPLICABLE REGULATIONS
SECTION RULE VERIFICATION
Mine Material Transfer operation- from the mine to the Metcalf concentrator, from the Metcalf concentrator to the SX Circuit, from the mine to Morenci concentrator, Morenci concentrator to the Bedding plant Concentrators
40 CFR 60, Subpart LL A.A.C R 18-2-721
NSPS Subpart LL is applicable to each crusher and screen in open-pit mines; each crusher, screen, bucket elevator, conveyor belt transfer point, thermal dryer, product packaging station, storage bin, enclosed storage area, truck loading station, truck unloading station, railcar loading station, and railcar unloading station at the mill or concentrator that commences construction or modification after August 24, 1982. For all other equipment, A.A.C. R 18-2-721 is applicable.
Table 2: VERIFICATION OF APPLICABLE REGULATIONS (contd.)
SECTION/
EQUIPMENT DATE OF
MANUFACTURECONTROL
DEVICE RULE VERIFICATION
Turbines Gas Turbine #1 Gas Turbine #2
1970 1970
None
A.A.C. R 18-2-719
NSPS Subpart GG is applicable to gas turbines which commenced construction, modification, or reconstruction after October 3, 1977. The year of manufacture of gas turbines is before the trigger date for Subpart GG. Hence NSPS is not applicable. Therefore, A.A.C. R 18-2-719 is applicable to gas turbines.
Freeport-McMoRan Morenci, Inc.; Permit #42474 4 September 8, 2008 Technical Support Document
Table 2: VERIFICATION OF APPLICABLE REGULATIONS (contd.)
SECTION/ EQUIPMENT
DATE OF MANUFACTURE
CONTROL DEVICE
RULE VERIFICATION
Steam Boilers Boiler #1 Boiler #2
1970 1970
None
A.A.C. R 18-2-703
40 CFR 60 Subpart D & Da are applicable to each fossil-fuel-fired steam generating unit of more than 73 megawatts (MW) heat input rate (250 million British thermal units per hour (MMBtu/hr) that commenced construction or modification after August 17, 1971 or September 18, 1978 respectively. The year of manufacture of these boilers is before the trigger date for Subpart D & Da. Hence NSPS is not applicable. Therefore, A.A.C. R 18-2-703, is applicable to these boilers.
A.A.C. R18-2-702.B.3 A.A.C. R18-2-702.C
The cooling tower is subject to the generally applicable opacity emission standard because it is not subject to an applicable NSPS under Article 9 of A.A.C. R18-2 or any specific standard under Article 7
A.A.C. R18-2-730.A.1
The cooling tower is subject to the generally applicable PM emission standard because it is an unclassified process source.
Cooling Tower Drift Eliminator
A.A.C. R18-2-730.G
The general requirement related to air pollution impacts to adjoining property and the ability of the Director to require the installation of abatement equipment is applicable.
Freeport-McMoRan Morenci, Inc.; Permit #42474 5 September 8, 2008 Technical Support Document
Table 2: VERIFICATION OF APPLICABLE REGULATIONS (contd.)
SECTION/ EQUIPMENT
DATE OF MANUFACTURE
CONTROL DEVICE
RULE VERIFICATION
Lime Slaking Plant Lime Silo #1 & #2 Lime Slakers #1 & #2
N/A
N/A
Dust Filter Water Spray mist control
A.A.C. R 18-2-730
NSPS Sub part HH is applicable to each rotary lime kiln used in the manufacture of lime. Since FMMI is not manufacturing lime at its facility, Subpart HH is not applicable. Therefore, A.A.C. R 18-2-730 is applicable to unclassified sources.
Solution Extraction/ Electrowinning SX/EW equipment
1987 to 2005
Baghouse
A.A.C. R 18-2-730.
A.A.C. R 18-2-730 is applicable to unclassified sources.
SX/EW Boiler #1, 2, 3, 4, and 5.
1995, 1998, 1998, 2000, and 2000.
None
40 CFR 60 § Sub Part Dc
NSPS Subpart Dc is applicable to each steam generating unit for which construction, modification, or reconstruction is commenced after June 9, 1989 and that has a maximum design heat input capacity of 29 megawatts (MW) (100 million British thermal units per hour (MMBtu/hr) or less, but greater than or equal to 2.9 MW (10 MMBtu/hr). NSPS subpart Dc is applicable to these boilers.
Freeport-McMoRan Morenci, Inc.; Permit #42474 6 September 8, 2008 Technical Support Document
Table 2: VERIFICATION OF APPLICABLE REGULATIONS (contd.)
SECTION/
EQUIPMENT DATE OF
MANUFACTURECONTROL
DEVICE RULE VERIFICATION
Small Industrial Boiler (009-301)
N/A
None A.A.C. R 18-2-724
NSPS Subpart Dc is applicable to each steam generating unit for which construction, modification, or reconstruction is commenced after June 9, 1989 and that has a maximum design heat input capacity of 29 megawatts (MW) (100 million British thermal units per hour (MMBtu/hr) or less, but greater than or equal to 2.9 MW (10 MMBtu/hr). The capacity of this boiler is 2.6 MMBtu/hour. Hence NSPS is not applicable. Therefore, A.A.C. R 18-2-724 is applicable.
Tank Farm Gasoline Tanks Gasoline Tank #G1 #G2 #G3
Prior to 1984
None
A.A.C. R18-2-710
NSPS subparts K, Ka and Kb are applicable to gasoline tanks with capacity greater than or equal to 75 M3 (19812 gallons). The capacity of these tanks is 12000 gallons. Hence NSPS is not applicable. A.A.C. R18-2-710 is applicable to storage tanks handling petroleum liquids, and, hence, applicable to gasoline storage tanks.
Concentrate Leach Plant (CLP)
N/A
Wet Scrubber
A.A.C. R 18-2-730
This standard is applicable to unclassified sources.
Freeport-McMoRan Morenci, Inc.; Permit #42474 7 September 8, 2008 Technical Support Document
Table 2: VERIFICATION OF APPLICABLE REGULATIONS (contd.)
SECTION/ EQUIPMENT
DATE OF MANUFACTURE
CONTROL DEVICE
RULE VERIFICATION
Boiler N/A
None 40 CFR 60 Sub Part Dc
NSPS Subpart Dc is applicable to each steam generating unit for which construction, modification, or reconstruction is commenced after June 9, 1989 and that has a maximum design heat input capacity of 29 megawatts (MW) (100 million British thermal units per hour (MMBtu/hr) or less, but greater than or equal to 2.9 MW (10 MMBtu/hr). NSPS subpart Dc is applicable to this boiler.
Concrete Batch Plant
N/A
Water and other reasonable precautions
Article 6, A.A.C. R18-2-702
These standards are applicable to concrete batch plant sources.
Fugitive dust sources
N/A
Water and other reasonable precautions
Article 6, A.A.C. R18-2-702
These standards are applicable to fugitive dust sources.
Mobile sources
- Water Sprays/Water Truck for dust control
Article 8 This Article is applicable to off-road mobile sources, which either move while emitting air pollutants or are frequently moved during the course of their utilization.
Abrasive Blasting
- Water and enclosure
A.A.C. R-18-2-726
This standard is applicable to any abrasive blasting operation.
Spray painting operations
- Enclosed area A.A.C. R-18-2-727
This standard is applicable to any spray painting operation.
Demolition/ renovation operations
- A.A.C. R18-2-1101.A.8, Subpart M
This standard is applicable to any asbestos related demolition or renovation operations.
Freeport-McMoRan Morenci, Inc.; Permit #42474 8 September 8, 2008 Technical Support Document
VII. PREVIOUS PERMIT AND PERMIT CONDITIONS
A. PREVIOUS PERMITS
Table 3: PREVIOUS PERMITS
Permit # Issue Date Application Basis
M110734P1-99 May 5, 2001 Title V Operating Permit
35471 September 26, 2005 Minor Permit Revision
36341 November 23, 2005 Minor Permit Revision
36424 March 10, 2006 Significant Permit Revision
41833 March 23, 2007 Minor Permit Revision
42707 July 31, 2007 Minor Permit Revision
46398 May 5, 2008 (Approved on)
Minor Permit Revision
B. PREVIOUS PERMIT CONDITIONS
1. Operating Permit #M110734P1-99
Determination Condition # Delete Kept Revise Streamline
Comments
Attachment A x This has been revised and most recent Attachment “A” is used for this permit.
Attachment B I x
This condition is for facility-wide
requirements. Mine Area II.A.1
x
This condition is for emission limitations/standards for “Existing” emission units.
II.A.2 x This condition is for emission limitations/standards for “New” emission units.
II.B.1 x This condition is for air pollution control requirements for “New” emission units.
Freeport-McMoRan Morenci, Inc.; Permit #42474 9 September 8, 2008 Technical Support Document
1. Operating Permit #M110734P1-99 (contd.)
Determination Condition #
Delete Kept Revise Streamline Comments
Mine Area II.B.2
x This condition is for air pollution control requirements for “Existing” emission units.
II.C.1.a, b, and c
x This condition is for monitoring, reporting, and recordkeeping requirements for “Existing” emission units.
II.C.1.d x This condition is for performance testing requirements for “Existing” emission units.
II.C.2.a, b, c, and d
x This condition is for monitoring, reporting, and recordkeeping requirements for “New” emission units.
II.C.2.e x This condition is for performance testing requirements for “New” emission units.
II.D x This condition is for throughput limitation of the mine.
Material Transfer Operation III.A
x This condition is for opacity standard for material transfer area.
III.B x This condition is for air pollution control requirements.
III.C x This condition is for voluntary limitation accepted by the source.
III.D x This condition is for monitoring, reporting, and recordkeeping requirements.
III.E x This condition is for performance testing requirements.
Concentrators IV.A.1
x
This condition is for emission limitation/ standards for “Existing” emission units.
IV.A.2
x This condition is for emission limitation/ standards for “New” emission units.
IV.B x This condition is for air pollution control requirements for “New” and “Existing” emission units.
IV.C.1.a, b, & c
x This condition is for monitoring, reporting, and recordkeeping requirements for “Existing” emission units.
Freeport-McMoRan Morenci, Inc.; Permit #42474 10 September 8, 2008 Technical Support Document
1. Operating Permit #M110734P1-99 (contd.)
Determination Condition # Delete Kept Revise Streamline
Comments
Concentrators IV.C.1.d
x This condition is for performance testing requirements for “Existing” emission units.
IV.C.2.a, b, c, & d
x This condition is for monitoring, reporting, and recordkeeping requirements for “New” emission units.
IV.C.2.e x This condition is for performance testing requirements for “New” emission units.
Morenci Steam Power Plant V
x
This condition for Morenci Steam Power plant requirements has been deleted since this has been removed by FMMI.
Metcalf Combined Cycle Power Plant VI
x This condition for voluntarily accepted limitation for fuel usage, emission limitation/standards (particulate matter and opacity), and monitoring, reporting, & recordkeeping requirements for Metcalf combined cycle power plant has been revised since FMMI has taken voluntary limitation on the fuel usage. FMMI shall be using only natural gas as the fuel in the gas turbine generators and boilers. Accordingly, conditions relevant to use of natural gas have been incorporated.
Southwest Lime Plant VII.A
x This condition for emission limitation/ standards has been placed under Lime Slaking plant.
VII.B x This condition for air pollution control requirements has been placed under Lime Slaking plant.
VII.C.1, 2, & 3 x This condition for monitoring, reporting, and recordkeeping requirements has been placed under Lime Slaking plant.
VII.C.4 x This condition for performance testing requirements has been placed under Lime Slaking plant.
Solution Extraction/ Electrowinning VIII.A
x This condition is for emission limitation/standards, air pollution control requirements, and monitoring, reporting, & recordkeeping requirements of VOCS and other miscellaneous emissions.
Freeport-McMoRan Morenci, Inc.; Permit #42474 11 September 8, 2008 Technical Support Document
1. Operating Permit #M110734P1-99 (contd.)
Determination Condition # Delete Kept Revise Streamline
Comments
VIII.B.1 x This condition for emission limitation/standards and monitoring, reporting, & recordkeeping requirements of opacity and particulate matter from Hot Water heaters #1, 2, 3, 4, and 5 has been placed for the small industrial boiler and dryer heater.
VIII.B.2 x This condition for emission limitation/standards and monitoring, reporting, & recordkeeping requirements is for the SX/EW boilers.
IX. x This condition is for the Tank Farm Gasoline Storage Tanks.
X. x This condition for Diesel Generator has been deleted since this has been determined by ADEQ to be a non-road engine.
XI x This condition is for emission limitation/standards and monitoring, reporting, & recordkeeping requirements for non point sources.
XII x This condition is for the control of fugitive dust and opacity from the concrete batch plant.
XIII x This condition is for the opacity, particulate matter emission, and monitoring, reporting, & recordkeeping requirements for the mine portable grizzly.
XIV x This condition for the Pumps and Compressors has been included in the condition for Tank Farm Gasoline Storage Tanks.
XV x This condition is for the other periodic activities.
2. Minor Permit Revision #35471
Freeport-McMoRan Morenci, Inc.; Permit #42474 12 September 8, 2008 Technical Support Document
Determination Condition # Delete Kept Revise Streamline
Comments
Copper Powder Plant VIII.A.2.c
x This condition is an air pollution control requirement for the dryer for drying the produced copper powder.
VIII.A.2.d x This condition is an air pollution control requirement for the dryer feeder, trash screen, product storage bin, product packaging, and product feed conveyor.
VIII.A.3 x This condition is for monitoring, reporting, and recordkeeping requirements.
3. Minor Permit Revision #36341
Determination Condition # Delete Kept Revise Streamline
Comments
II.B.3 x This condition is an air pollution control requirement for the portable rock crusher and screening plant under “New” emission units in the mine area.
II.E x This condition for the notification requirements for the portable rock crusher and screening plant has been deleted since the requirements have already been met.
II.F x This condition is for performance testing of the new portable rock crusher and screening plant.
4. Significant Permit Revision #36424
Determination Condition #
Delete Kept Revise Streamline Comments
Mine Area II.A.1
x
This condition is for emission limitations for “Existing” emission units.
II.A.2 x This condition is for emission limitations for “New” emission units.
II.B.1 & 3. x This condition is for air pollution control requirements for “New” emission units.
II.B.2 x This condition is for air pollution control requirements for “Existing” emission units.
4. Significant Permit Revision #36424 (contd.)
Freeport-McMoRan Morenci, Inc.; Permit #42474 13 September 8, 2008 Technical Support Document
Determination Condition # Delete Kept Revise Streamline
Comments
II.C.1.a, b, and c
x This condition is for monitoring, reporting, and recordkeeping requirements for “Existing” emission units.
II.C.1.d x This condition is for performance testing requirements for “Existing” emission units.
II.C.2.a, b, c, and d
x This condition is for monitoring, reporting, and recordkeeping requirements for “New” emission units.
II.C.2.e x This condition is for performance testing requirements for “New” emission units.
II.D x This condition is for throughput limitation of the mine.
Material Transfer Operation III.A
x
This condition is for opacity standard.
III.B x This condition is for air pollution control requirements.
III.C x This condition is for voluntary limitation accepted by the source.
III.D x This condition is for monitoring, reporting, and recordkeeping requirements.
III.E x This condition is for performance testing requirements.
Concentrators IV.A.1
x
This condition is for emission limitation/ standards for “Existing” emission units.
IV.A.2
x This condition is for emission limitation/ standards for “New” emission units.
IV.B x This condition is for air pollution control requirements for “New” and “Existing” emission units.
IV.C.1.a, b, & c
x This condition is for monitoring, reporting, and recordkeeping requirements for “Existing” emission units.
IV.C.1.d x This condition is for performance testing requirements for “Existing” emission units.
IV.C.2.a, b, c, & d
x This condition is for monitoring, reporting, and recordkeeping requirements for “New” emission units.
4. Significant Permit Revision #36424 (contd.)
Freeport-McMoRan Morenci, Inc.; Permit #42474 14 September 8, 2008 Technical Support Document
Determination Condition #
Delete Kept Revise Streamline Comments
VII. x This condition is for emission
limitation/standards, air pollution control requirements, and monitoring, reporting, & recordkeeping requirements for lime slaking plant.
XVI.A x This condition is for the emission limitation/standards for the concentrate leach plant.
XVI.B x This condition is for the air pollution control requirements for the concentrate leach plant
XVI.C.1 & 2 x This condition is for the monitoring, reporting, and recordkeeping requirements for the concentrate leach plant
XVI.C.4 x This condition is for the performance testing requirements for the concentrate leach plant
XVII.A x This condition is for the emission limitation/standards for the natural gas boiler associated with the concentrate leach plant.
XVII.B x This condition is for the monitoring, reporting, and recordkeeping requirements for the natural gas boiler associated with the concentrate leach plant.
5. Minor Permit Revision #41833
Determination Condition #
Delete Kept Revise Streamline Comments
Mine Area II.C.2.c.(1)
x
This condition for baseline opacity level for “New” emission units has been deleted since these have been determined.
II.C.2.e.(2) x This condition is for performance test for “New” emission units.
III.E.2 x This condition is for performance test for emission units in the material transfer area.
IV.C.1.d.(4)
x
This condition is for performance testing requirements for “Existing” emission units in the concentrator area.
VII.C.1 x This condition for the performance test in the lime slaking area has been deleted since the emissions are very small.
XVI.C.1 x This condition for baseline opacity level in the concentrate leach plant has been deleted since these have already been determined.
5. Minor Permit Revision #41833 (contd.)
Condition # Determination Comments
Freeport-McMoRan Morenci, Inc.; Permit #42474 15 September 8, 2008 Technical Support Document
Delete Kept Revise Streamline XVI.C.4.a &b x This condition is for performance testing
requirements for emission units in the concentrate leach plant.
6. Minor Permit Revision #42707
Determination Condition #
Delete Kept Revise Streamline Comments
III.B.3
x This condition is for air pollution control
requirements in the material transfer area. III.E.2 x This condition is for performance testing
requirement in the material transfer area. VIII. PERIODIC MONITORING
A. Mines, Material Transfer, and Concentrators
1. Equipment Subject to Non-NSPS- PM and Opacity Standards
These units are subject to the 20 percent opacity standard under A.A.C. R18-2-702 and particulate matter emission standards under A.A.C. R18-2-721.B.2. The Permittee is required to establish a baseline opacity level at the exit of air pollution control equipment under normal representative operating conditions. The Permittee is required to make a bi-weekly survey of the visible emissions from the emission units including fugitive emissions. The Permittee is required to create a record of the date on which the survey was taken, the name of the observer, and the results of the survey. If the visible emissions do not appear to exceed the baseline opacity level, the Permittee would note in the record that the visible emissions were below the baseline opacity, and it did not require a Method 9 to be performed.
If the Permittee finds that on an instantaneous basis the visible emissions appear to be in excess of the baseline opacity level but appear to be below the opacity standard, then the Permittee is required to make a six-minute Method 9 observation. If this observation indicates opacity in excess of the baseline opacity level but below the opacity standard then the Permittee is required to adjust or repair the controls or the equipment to bring the opacity below baseline level.
If the six-minute reading indicates that the opacity is above both the baseline level and the opacity standard then the Permittee is required to adjust the process equipment or process control equipment to bring the opacity below the baseline level. In addition, the Permittee must report the event as excess emission.
If the Permittee finds that the visible emissions are less than the baseline opacity, then the Permittee is required to record the source of emission, date, time, and result of the test. The Permittee is required to adopt a similar approach with fugitive dust emissions at the mine. However, rather than establishing baseline opacity level for fugitive emissions the Permittee is required to conduct a visual survey of visible
Freeport-McMoRan Morenci, Inc.; Permit #42474 16 September 8, 2008 Technical Support Document
emissions against the 40 percent opacity standard. ADEQ has determined that the bi-weekly visual survey approach identified in the preceding paragraphs will reasonably assure compliance with the opacity and particulate matter standards. The permit requires a representative stack test every year plus periodically monitoring of stack opacity to fulfill the periodic monitoring requirements for particulate matter emissions. Although no data is available to directly correlate opacity to particulate matter emissions, opacity observation will indicate potential problems with the air pollution control equipment. If corrective actions are taken to rectify the problems associated with the pollution control device, then compliance can be inferred on the basis that the source operates its pollution control equipment in a manner consistent with good air pollution control practices. Opacity above the baseline level but less than the standard does not hold the source in violation of the particulate matter standard, but merely requires the source to identify and alleviate the problem by taking corrective actions to reduce the opacity to less than the baseline level. However, not taking corrective action could potentially hold the source in violation of the permit terms.
Also, it shall be noted that all references to a Method 9 observation shall be construed as meaning a six-minute observation and not a 3-hour performance test.
2. Equipment Subject to NSPS PM and Opacity Standards
These units are subject to the stack opacity standard of 7 percent (unless controlled by a wet scrubbing emission control device) under 40 CFR 60.382(a)(2), the fugitive opacity standard of 10 percent under 40 CFR 60.382(b), and the particulate matter standard of 0.05 grams per dry standard cubic meter under 40 CFR 60.382(a)(1).
For the purposes of periodic monitoring of particulate matter emissions, the Permittee is required to install, calibrate, maintain, and operate monitoring devices for continuous measurement of the change in pressure of the gas stream through the scrubber and the scrubbing liquid flow rate to the scrubber. For the purposes of periodic monitoring of opacity of fugitive emissions, the Permittee is required to adopt the bi-weekly visual survey of visible emissions approach identified above against the applicable fugitive opacity standard of 10 percent.
B. Metcalf Combined Cycle Power Plant (CCPP)
In the combined cycle operation of gas turbine and boiler, exhaust of gas turbine acts as a feed to the boiler unit and nothing leaves the stack of the gas turbine. In this case, the applicable standards for the CCPP operation mode are only those applicable to the operation of boilers.
1. Boiler #1/Combined Cycle Operation of Gas Turbine #1 & Boiler #1 and
Freeport-McMoRan Morenci, Inc.; Permit #42474 17 September 8, 2008 Technical Support Document
Boiler #2/Combined Cycle Operation of Gas Turbine #2 & Boiler #2 a. Opacity
The boilers are subject to the opacity standard of 20 percent under the general visible emissions rule in A.A.C. R18-2-702.B. These units burn only natural gas. Natural gas is a clean burning fuel and inspections indicate that there have been no opacity problems. Hence, no monitoring is required when burning natural gas.
b. PM
The units are also subject to the particulate matter emissions standard in A.A.C. R18-2-703.C.1. This unit burns only natural gas. Natural gas is a clean burning fuel and results in negligible particulate matter emissions. Hence, no monitoring is required when burning natural gas.
2. Gas Turbine #1 and #2
a. Opacity:
The turbines are subject to the opacity standard of 20 percent in A.A.C. R18-2-719.E. Gas turbine #1 and #2 burn only natural gas. Natural gas is a clean burning fuel and usually does not pose a visible emissions problem. Hence, no monitoring is required when burning natural gas.
b. PM:
The units are also subject to the particulate matter emissions standard in A.A.C. R18-2-719.C.1. Natural gas is a clean burning fuel and results in negligible particulate matter emissions. Hence, no monitoring is required when burning natural gas.
3. Cooling Tower #1 and #2
a. The Permittee is required to perform quarterly survey of visible emissions from the cooling towers. If the opacity appears to exceed the standard, the Permittee is required to conduct EPA Method 9 observation by a certified EPA Reference Method 9 observer.
b. The Permittee is required to perform monthly inspections of the drift
eliminators to verify performance. The Permittee must keep records of the results of the inspections and any repairs performed in a written facility log.
C. Lime Slaking Plant
Freeport-McMoRan Morenci, Inc.; Permit #42474 18 September 8, 2008 Technical Support Document
Opacity and Particulate Matter Standard
The emission units are subject to the opacity standard of 20 percent under A.A.C. R18-2-702.B and the emission limits for particulate matter under A.A.C. R18-2-730.A.1.a. For the purposes of periodic monitoring of opacity of emissions and particulate matter emissions, the Permittee is required to adopt the bi-weekly visual survey of visible emissions approach identified in Section VIII.A.1 of this technical support document.
In addition, the Permittee is required to maintain and operate the air pollution control equipment in accordance with the manufacturer’s specifications. The Permittee is also required to keep these specifications on file. Emissions related maintenance work performed on the air pollution control equipment and/or the process equipment must be recorded.
D. SX/EW Operations
1. SX/EW Plant
The intent of A.A.C. R18-2-730.D as applicable to the SX/EW process is to limit emissions from the equipment and operations associated with the SX/EW process so as to not cause air pollution. FMMI uses covered fixed roof mixer/settler tanks for all SX facilities and their associated ancillary process tanks. Extraction of copper from pregnant leach solution takes place in the mixer settler tanks. Usage of covered mixer settler tanks was prescribed as a control measure for the SX circuit. This was done following the site visits by the permit engineers to the respective facility and the fact that almost all of the tanks utilized covered roofs.
2. SX/EW Boilers
The Permittee is limited to burn only natural gas in these units. The Permittee has accepted voluntary limitation on the gas consumption in these boilers. NSPS Subpart Dc is applicable to these boilers. There are no emission standards for opacity, particulate matter, SOx, or NOx for natural gas using boilers in the NSPS. The Permittee must keep a daily record of fuel consumed in these boilers. At the end of each day, 365-day total of fuel and MMBtu consumed shall be computed.
E. Concentrate Leach Plant (CLP)
1. Particulate Matter
All the emission points in the CLP are subject to A.A.C. R18-2-730. The Permittee is accepting a limit on PM and PM10 emissions of 0.75 lbs per hour from the wet
Freeport-McMoRan Morenci, Inc.; Permit #42474 19 September 8, 2008 Technical Support Document
scrubber associated with the pressure leach vessel. Monitoring requirement includes submission and implementation of a visual observation plan to the Director. A certified Method 9 observer must conduct, in accordance with the observation plan, a bi-weekly visual survey of visible emissions from the CLP when in operation. If the observer, during the visual survey, does not see a plume from the stack of the air pollution control equipment that on an instantaneous basis appears to exceed the baseline level, then the observer shall keep a record of the name of the observer, the date on which the observation was made, and the result of the observation. If the observer sees a plume from the stack of the air pollution control equipment that on an instantaneous basis appears to exceed the baseline level, then the observer shall, if practicable, take a six-minute Method 9 observation of the plume. If the observer records a reading in excess of the baseline, the Permittee shall initiate corrective action measures to address it. If the reading is above the opacity standard, the Permittee shall report the incident as excess emissions.
2. Volatile Organic Compounds (VOC)
All the emission points in the CLP are subject to A.A.C. R18-2-730. FMMI has accepted a limit of 5.82 pounds per hour on VOC emissions from the wet scrubber associated with the pressure leach vessels.
F. Non-Point Sources Monitoring Non-point sources are subject to the 40 percent opacity standard and other Article 6 requirements. Periodic monitoring for opacity standard entails a bi-weekly visible emissions survey in accordance with an ADEQ-approved observation plan, by a certified Method 9 observer. If the visible emissions survey indicates that a Method 9 reading may be required, the observer shall do so, and maintain records of the results. Any observed exceedance of the opacity standard should be reported appropriately. Article 6 regulations also contain applicable requirements for non-point source emissions. These regulations require the Permittee to employ various control methods to suppress particulate emissions. The permit lists the various methods of dust suppression that may be used. By not restricting the Permittee to use only one of the methods, the permit provides the flexibility required to facilitate employment of effective control measures. Periodic monitoring data for these applicable requirements is conducted in line with the non- point source monitoring plan.
IX. COMPLIANCE ASSURANCE MONITORING (CAM) (40 CFR 64)
The CAM rule applies to "pollutant-specific emission units" (PSEU) at a major Title V source if the unit meets all of the following criteria: A. The unit is subject to an emission limit or standard for the applicable regulated air pollutant;
Freeport-McMoRan Morenci, Inc.; Permit #42474 20 September 8, 2008 Technical Support Document
B. The unit uses a control device to achieve compliance with the emission limit or standard; and C. The unit has "potential pre-control device emissions" of the applicable regulated air pollutant
equal to or greater than 100% of the amount (tons/year) required for a source to be classified as a major source. "Potential pre-control device emissions" means potential to emit (PTE, as defined in Title V) except emissions reductions achieved by the applicable control device are not taken into account.
The general purpose of monitoring required by the CAM rule is to assure compliance with emission standards by ensuring that control devices meet and maintain the assumed control efficiencies. Compliance is ensured through requiring monitoring of the operation and maintenance of the control equipment and, if applicable, operating conditions of the pollutant-specific emissions unit. For the PSEUs that have post control potential to emit equal to or greater than 100 percent of the amount, in tons per year, required for a source to be classified as a major source, for each parameter monitored, the owner shall collect four or more data values equally spaced over each hour. Such units are defined as “large” PSEUs. For all other PSEUs (“small” PSEUs), the monitoring shall include some data collection at least once per 24-hour period. In the specific case of FMMI, all the PSEUs have post control emission below the major source threshold and therefore require data collection once in 24-hour period. Table 4 provides a list of small PSEUs at FMMI.
Table 4: CAM Applicable Units
(Defined as small pollutant specific emission units under 40 CFR 64)
S. No. EQUIPMENT PROCESS # CONTROL DEVICE
1 In-Pit Crusher #1 001-005 Wet Scrubber
2 In-Pit Crusher #2 001-006 FFDC
3 DC1 to P8 001-007 FFDC
4 Surge Pile Baghouse 001-012 Baghouse
Table 4: CAM Points (contd.)
S. No. EQUIPMENT PROCESS # CONTROL DEVICE
5 P2/P4 001-013 FFDC
Freeport-McMoRan Morenci, Inc.; Permit #42474 21 September 8, 2008 Technical Support Document
6 P4/P5
001-014 FFDC
7 P5/P6
001-015 FFDC
8 IOS #1 Wet Scrubber
001-018 Wet Scrubber
9 DC2/P9, P9/P10
001-225 FFDC
10 DC2/P5
001-225 FFDC
11 In-Pit Crusher #3 001-250 FFDC
12 BF3/DC3 and DC3/P5 001-251
FFDC
13 001-255 FFDC
14 Morenci Fine Crushing Line B 002-030 FFDC
15 Fine Crushing 003-089 Wet scrubber #5
16 Fine Crushing 003-090 Wet scrubber #8
17 Fine Crushing 003-092 Wet scrubber #1
18 Morenci Fine Crushing Line C 002-031 FFDC
19 Morenci Fine Crushing Line D 002-032 FFDC
20 R4 to R5 and R5 to R6 003-080 FFDC
21 Fine Crushing 003-088 Wet scrubber #4
B. Monitoring Approach
FMMI uses FFDC, bag collectors, bag filters and wet scrubbers as the control devices for controlling the emissions of particulate matter (both PM and PM10). The monitoring approach for the various control devices is detailed below.
Freeport-McMoRan Morenci, Inc.; Permit #42474 22 September 8, 2008 Technical Support Document
1. FFDC, Bag Collectors, and Bag filters
Table 5: Monitoring Approach for FFDC, Bag collectors, and Bag filters
Indicator Visible emissions
Indicator Range No visible emissions.
Measurement approach Visible emissions from the control device exhaust will
be monitored daily using EPA Reference Method 22.
QA/QC practices and criteria
Operate and maintain the control device in a manner consistent with good air pollution control practice.
Excursion Range Any opacity observed during the visible emission survey.
2. Wet Scrubber
Table 6: Monitoring Approach for Wet Scrubbers
Indicator 1 Indicator 2 Indicator Scrubber liquid flow rate Gas stream pressure drop
Indicator Range
The indicator range for liquid flow rate will be ±30% of the value established during annual performance testing.
The indicator range for pressure drop will be ±30% of the value established during annual performance testing.
QA/QC practices and criteria
Operate and maintain flow indicators in a manner consistent with good air pollution control practice.
Operate and maintain pressure indicators in a manner consistent with good air pollution control practice.
Measurement approach
The scrubber flow rate monitors will be in continuous operation and shall be recorded once every day.
The pressure drop monitors will be in continuous operation and shall be recorded once every day.
Table 6: Monitoring Approach for Wet Scrubbers (contd.)
Indicator 1 Indicator 2 Excursion Range
Events when the liquid flow rate differs by more than ±30 percent
Events when the pressure drop differs by more than ±30 percent from the
Freeport-McMoRan Morenci, Inc.; Permit #42474 23 September 8, 2008 Technical Support Document
from the average obtained during the most recent performance test on the wet scrubber.
average obtained during the most recent performance test on the wet scrubber.
X. TESTING
A. Particulate Matter
In order to stay below PSD thresholds, the Permittee has adopted various air pollution control measures like wet scrubbers, FFDC, water spray system, etc. for controlling emission of particulate matter and volatile organic compounds throughout the facility. FMMI has voluntarily accepted emission limits for PM and PM10 from the control devices. In order to show compliance with the voluntarily accepted emission limits, the Permittee will conduct performance tests on the stacks of the control device as per the testing schedule attached as Annexure I.
B. NOx and CO
1. CCPP Operation
In the CCPP operation, exhaust of gas turbine acts as a feed to the boiler and the products of combustion of natural gas feed to gas turbine and additional natural gas feed to boilers exit through the stack at the boilers. In order to show compliance with the emission factor in AP-42, the Permittee will conduct performance test on the stack of boilers as per the testing schedule attached as Annexure I.
2. Gas Turbine #1 and #2
In order to show compliance with the emission factor in AP-42, the Permittee will conduct performance test on the stack of gas turbines as per the testing schedule attached as Annexure I.
XI. INSIGNIFICANT ACTIVITIES
The following activities were listed as insignificant by the Permittee in their application and have been deemed either insignificant or not insignificant by the Department:
Table 7: Insignificant Activity List
S. No.
Activity
Determination
Justification
1
Non-commercial (in-house) experimental, analytical laboratory equipment which is bench
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
Freeport-McMoRan Morenci, Inc.; Permit #42474 24 September 8, 2008 Technical Support Document
scale in nature including quality control/quality assurance laboratories supporting an electric utility facility, and research and development laboratories.
2
Small pilot scale research and development projects.
No
These will be evaluated on a case by case basis considering size, nature and amount of emissions, and duration of project. Appropriate permits will have to be obtained as required by the regulations
3 Housekeeping activities and associated products used for cleaning purposes, including collected spilled and accumulated materials at the source, including operation of fixed vacuum cleaning systems for such purposes.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.a
4
Air conditioning, cooling, heating or ventilation equipment not designed to remove air contaminants generated by or released from associated or other equipment.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.a
5
General office activities, such as paper shredding, copying, photographic activities, and blueprinting, but not to include incineration.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
6
Restroom facilities and associated cleanup operations and stacks or vents used to prevent the escape of sewer gasses through plumbing traps.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.a
7
Smoking rooms and areas.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
Table 7: Insignificant Activity List
S. No.
Activity
Determination
Justification
8
Use of consumer products, including hazardous
Yes Insignificant pursuant to
Freeport-McMoRan Morenci, Inc.; Permit #42474 25 September 8, 2008 Technical Support Document
substances as that term is defined in the Federal Hazardous Substances Act (15 U.S.C. 1261, et. seq.) where the product is used at a source in the same manner as normal consumer use.
A.A.C. R18-2-101.57.j
9 Vacuum cleaning systems where the system is used exclusively for industrial or commercial use.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
10
Building maintenance and janitorial activities.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.a
11
Batch mixers with rated capacity of 5 ft3 or less.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.d
12
Internal combustion (IC) engine driven compressors, IC engine electrical generator sets and IC engine driven water pumps used only for emergency replacement or standby service.
No
Subject to A.A.C. R18-2-719
13
Water treatment or storage for boiler feed water.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
14
Water treatment or storage or cooling systems for process water.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
15
Chemical storage associated with water and wastewater treatment where the water is treated for consumption and/or use within the permitted facility (limited to chemicals not listed in 40 CFR 68.13, chemicals listed in 40 CFR 68.13 but not stored in quantities less than threshold levels, and not subject to any applicable regulation under the Act or the Arizona Revised Rules).
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
16
The collection, transmission, liquid treatment and solids treatment process and domestic type wastewater and sewage treatment works, or treatment facilities, including septic tank systems which treat only domestic type wastewater and sewage.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
Table 7: Insignificant Activity List
S. No.
Activity
Determination
Justification
Freeport-McMoRan Morenci, Inc.; Permit #42474 26 September 8, 2008 Technical Support Document
17 Firefighting activities and training conducted at the source in preparation for firefighting.
Yes Insignificant pursuant to A.A.C. R18-2-602.C.2.b
18
Open burning activities.
No
Subject to A.A.C. R18-2-602
19
Flares used to indicate danger
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
20
Chemical storage and process holding tanks(limited to chemicals not listed in 40 CFR 68.13, chemicals listed in 40 CFR 68.13 but not stored in quantities less than threshold levels, and not subject to any applicable regulation under the Act or the Arizona Revised Rules)
May be
Not insignificant, if subject to A.A.C. R18-2-730. Case by case determination is required.
21
Storage and piping of natural gas or liquefied petroleum gas.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
22
Storage and piping of butane or propane.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
23
Gasoline storage tanks with capacity of 10,000 gallons or less.
No
Subject to A.A.C. R18-2-710
24
Diesel fuel storage tanks with capacity of 40,000 gallons or less.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.c
25
Petroleum product storage tanks containing lubricating oil, transformer oil, or used oil.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
26
Distribution and piping of diesel fuel, lubricating oil, used oil and transformer oil.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
27
Storage and handling of drums or other transportable containers where the containers are sealed during storage, and covered during loading and unloading (includes containers of RCRA waste and used oil).
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
Table 7: Insignificant Activity List (contd.)
Freeport-McMoRan Morenci, Inc.; Permit #42474 27 September 8, 2008 Technical Support Document
S. No. Activity Determination Justification
28 Waste motor oil collection and recycling.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
29
Storage tanks of any size containing exclusively soaps, detergents, waxes, greases, aqueous caustic solutions, or aqueous salt solutions.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
30
Storage tanks of any size containing exclusively aqueous acid solutions.
May be
These will be evaluated on a case by case basis. Subject to A.A.C. R18-2-730
31
Landscaping and site housekeeping equipment.
No
Subject to Article 8 regulations
32
Fugitive emissions from landscaping activities.
No
Subject to Article 6 regulations
33
Groundskeeping activities and products.
No
Subject to regulations under Article 6.
34
Shoveling ore to and from belt conveyors and transfer points as part of routine maintenance programs.
No
Subject to regulations under Article 6 or Article 7.
35
Air lance operations
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
36
Mechanized or manual cleanup and haulage operations
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
37
Concentrate reclamation
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
38
Waste concrete handling
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
Freeport-McMoRan Morenci, Inc.; Permit #42474 28 September 8, 2008 Technical Support Document
Table 7: Insignificant Activity List (contd.)
S. No.
Activity
Determination
Justification
39
Railroad track maintenance.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
40
Potable wellfield maintenance
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
41
Drilling and well development
No
Subject to regulations under Article 6.
42
Demolition, renovation and salvage operations.
No
Subject to regulations under Article 6 and/or 40 CFR 61, Subpart M
43
Cleanup of ditches
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
44
Storm water drainage control
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
45
Cleanout of water collection sumps
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
46 Cleanup of railcars
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
47
Cleanup of clogged chutes
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
48
Manual cleanup around conveyor belts and chutes.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
49
Activities associated with the construction, repair or maintenance of roads and other paved or open areas, including operation of street sweepers,
No
Subject to A.A.C. R18-2-605
Freeport-McMoRan Morenci, Inc.; Permit #42474 29 September 8, 2008 Technical Support Document
vacuum trucks, spray trucks and other vehicles related to the control of fugitive emissions of such roads or other areas.
50
Unpaved public and private roadways within a stationary source site boundary.
No
Subject to A.A.C. R18-2-605
Table 7: Insignificant Activity List (contd.)
S. No.
Activity
Determination
Justification
51
Road and lot paving operations at commercial and industrial facilities.
No
Subject to A.A.C. R18-2-604
52
Sanding of streets and roads to abate traffic hazards caused by ice and snow.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
53
Street and parking lot striping.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
54
Fugitive dust emissions from the operation of passenger automobile, station wagon, pickup truck or van at a stationary source.
No
Subject to A.A.C. R18-2-604
55
Small equipment operations such as bobcats and backhoes and other small earth moving activities used as part of facility cleanup and material haulage.
No
Subject to A.A.C. R18-2-604 and 804
56
Tailing dam maintenance.
No
Subject to regulations under Article 6.
57
Cafeterias, kitchens and other facilities used for preparing food or beverages primarily for consumption at the source.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
58
Equipment using water, water and soap or detergent or a suspension of abrasives in water for purposes of cleaning or finishing.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
59
Construction and disturbance of surface areas for purpose of land development.
No
Subject to A.A.C. R18-2-604
Freeport-McMoRan Morenci, Inc.; Permit #42474 30 September 8, 2008 Technical Support Document
Table 7: Insignificant Activity List (contd.)
S. No.
Activity
Determination
Justification
60
Activities at a source associated with the maintenance, repair or dismantlement of an emission unit installed at the source, including preparation for maintenance, repair or dismantlement and preparation for subsequent startup, including preparation of a shutdown vessel for entry, replacement of insulation, welding and cutting, and steam purging of a vessel prior to startup.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
61
Maintenance, repair or dismantlement of buildings, utility lines, pipelines, wells, and other structures that do not constitute an emission unit.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
62
Containers, reservoirs, or tanks used exclusively in dipping operations to coat objects with oils, waxes or greases.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
63
Activities directly used in the diagnosis and treatment of disease, injury or other medical condition.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
64
Manually operated equipment used for buffing, polishing, carving, cutting, drilling, machining, routing, sawing, surface grinding or turning and associated venting hoods.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.f
65
Individual sampling points, analyzers, and process instrumentation, whose operation may result in emissions.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
66
Individual equipment that is transportable or
No
These will be evaluated
Freeport-McMoRan Morenci, Inc.; Permit #42474 31 September 8, 2008 Technical Support Document
activities within a facility established for testing units prior to sale or for purposes of research.
on a case by case basis considering size, nature and amount of emissions, and duration of project. Appropriate permits will have to be obtained as required by the regulations.
Table 7: Insignificant Activity List (contd.)
S. No.
Activity
Determination
Justification
67
Individual flanges, valves, pump seals, pressure relief valves and other individual components that have the potential for leaks.
No
Subject to A.A.C. R18-2-730
68
Brazing, soldering or welding operations.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
69
Battery recharging areas.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
70
Aerosol can usage.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
71
Plastic pipe welding.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
72
Acetylene, butane and propane torches.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
73
Architectural painting and associated surface preparation for maintenance purposes at individual or commercial facilities.
No
Subject to A.A.C. R18-2-727
74
Steam vents, condenser vents and boiler blow down
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
75
Equipment used exclusively for portable steam
Yes
Insignificant pursuant
Freeport-McMoRan Morenci, Inc.; Permit #42474 32 September 8, 2008 Technical Support Document
cleaning. to A.A.C. R18-2-101.57.j
76
Blast-cleaning equipment using a suspension of abrasive in water and any exhaust system or collector serving them exclusively.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
77
Surface impoundments such as ash ponds, cooling ponds, evaporation ponds, settling ponds and storm water ponds.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
78
Pump/motor oil reservoirs, such as gear box lubrication.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
Table 7: Insignificant Activity List (contd.)
S. No.
Activity
Determination
Justification
79
Transformer vents.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
80
Lubrication system vents.
Yes
Insignificant pursuant to A.A.C. R18-2-101. 57.j
81
Hydraulic system reservoirs.
Yes
Insignificant pursuant to A.A.C. R18-2-101. 57.j
82
Adhesive use which is not related to production.
Yes
Insignificant pursuant to A.A.C. R18-2-101. 57.j
83
Caulking operations that are not part of a production process.
Yes
Insignificant pursuant to A.A.C. R18-2-101. 57.j
84
Electric motors.
Yes
Insignificant pursuant to A.A.C. R18-2-101. 57.j
Freeport-McMoRan Morenci, Inc.; Permit #42474 33 September 8, 2008 Technical Support Document
85 Cathodic protection systems.
Yes
Insignificant pursuant to A.A.C. R18-2-101. 57.j
86
High voltage induced corona.
Yes
Insignificant pursuant to A.A.C. R18-2-101. 57.j
87
Production of hot/chilled water for on-site use not related to any industrial application.
May be
This shall be evaluated for applicability of A.A.C. R18-2-724 on a case –by –case basis.
88
Safety devices such as fire extinguishers.
Yes
Insignificant pursuant to A.A.C. R18-2-101. 57.j
89
Soil gas sampling.
Yes
Insignificant pursuant to A.A.C. R18-2-101. 57.j
90
Filter draining.
Yes
Insignificant pursuant to A.A.C. R18-2-101. 57.j
91
General vehicle maintenance and servicing activities at the source.
Yes
Insignificant pursuant to A.A.C. R18-2-101. 57.j
Table 7: Insignificant Activity List (contd.)
S. No.
Activity
Determination
Justification
92 Station transformers.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
93
Circuit breakers.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
94
Generation unit gas vents.
Yes
Insignificant pursuant to A.A.C. R18-2-
Freeport-McMoRan Morenci, Inc.; Permit #42474 34 September 8, 2008 Technical Support Document
101.57.j
95 Storage cabinets for flammable products.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
96
Fugitive emissions from landfill operations.
No
Subject to A.A.C. R18-2-731 (Landfill rule) or A.A.C. R18-2-730
97
HVAC vents.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
98
Wet cyclones and the ball mill circuits operated at the concentrators.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
99
Copper and Molybdenum Floatation.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
100
Copper Concentrate Filtering.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
101
Lime milling and classifying.
Yes
It is a completely wet process. Insignificant pursuant to A.A.C. R18-2-101.57.j
102
Ore, rock, tailing and concentrate reclamation practices.
No
Subject to Article 6 requirements.
103
Graders and Dozers.
No
Subject to Article 8 requirements.
Table 7: Insignificant Activity List (contd.)
S. No.
Activity
Determination
Justification
104
General startup and shutdown of process and
No Case-by-case evaluation
Freeport-McMoRan Morenci, Inc.; Permit #42474 35 September 8, 2008 Technical Support Document
pollution control equipment including maintenance activities.
based on terms of the applicable requirements.
105
Malfunction of process and pollution control equipment outside the normal operation scenarios.
No
Case-by-case evaluation based on terms of the applicable requirements.
106
General research activities such as testing water mist/spray controls for dust abatement.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
107
Incineration of methane gas and bar screen residue that is retained by the solids bar screen from the primary wastewater treatment facility.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
108
Incineration of used office paper material.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
109
General vehicle refueling, sulfuric acid unloading, used oil collection/processing and used oil storage tanks.
No
Subject to A.A.C. R18-2-730
110
Geologic and hydro geologic exploration drilling activities.
No
Subject to A.A.C. R18-2-604
111
Ammonium nitrate loading and unloading.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
112
Tire shredding.
Yes
Insignificant pursuant to A.A.C. R18-2-101.57.j
113
The Evan’s Point Limestone Quarry facilities including the pan feeder, crusher, and tramway were demolished during late 1996 and early 1997. However, as special projects warrant, limestone may be mined on a small-scale basis, using front-end loaders, ten yard end dump trucks or other similar equipment.
No
Subject to A.A.C. R18-2-604.
114
Water for Oxygen and PLVs Cooling Tower Yes Insignificant pursuant to A.A.C. R18-2-101.57.j
Table 7: Insignificant Activity List (contd.)
S. No.
Activity
Determination
Justification
115 Water treatment or Storage for Boiler Feed Yes Insignificant pursuant
Freeport-McMoRan Morenci, Inc.; Permit #42474 36 September 8, 2008 Technical Support Document
Water to A.A.C. R18-2-101.57.j
116 Concentrate Storage Tank Pump to Super Fine Grinding Vessel
Yes Insignificant pursuant to A.A.C. R18-2-101.57.j
117 Ground Concentrate Tank Pump to PLVs Yes Insignificant pursuant to A.A.C. R18-2-101.57.j
118 Lean Electrolyte Tank Pump to PLVs Yes Insignificant pursuant to A.A.C. R18-2-101.57.j
119 PLVs Coolant Tank Pumps to PLVs Yes Insignificant pursuant to A.A.C. R18-2-101.57.j
120 Concentrate Storage Tank Yes Insignificant pursuant to A.A.C. R18-2-101.57.j
121 Ground Concentrate Tank Yes Insignificant pursuant to A.A.C. R18-2-101.57.j
122 Lean Electrolyte Tank Yes Insignificant pursuant to A.A.C. R18-2-101.57.j
123 PLVs Coolant Tank Yes Insignificant pursuant to A.A.C. R18-2-101.57.j
124 Tailing Neutralization Tank Yes Insignificant pursuant to A.A.C. R18-2-101.57.j
125 Super Fine Grinding Vessel Yes Insignificant pursuant to A.A.C. R18-2-101.57.j
126 CCD Thickeners Yes Insignificant pursuant to A.A.C. R18-2-101.57.j
127 Decant Thickeners Yes Insignificant pursuant to A.A.C. R18-2-101.57.j
128 Strong PLS Clarifier Yes Insignificant pursuant to A.A.C. R18-2-101.57.j
129 Oxygen Plant Yes Insignificant pursuant to A.A.C. R18-2-101.57.j
Freeport-McMoRan Morenci, Inc.; Permit #42474 37 September 8, 2008 Technical Support Document
130 CCD Feed Coolers Yes Insignificant pursuant to A.A.C. R18-2-101.57.j
131 Concentrate Repulp Tank Feed Conveyor No Subject to A.A.C. R18-2-730
132 Surfactant feed to Pressure Leach Vessels in CLP
No Subject to A.A.C. R18-2-730
XII. LIST OF ABBREVIATIONS A.A.C. .............................................................................................................. Arizona Administrative Code ADEQ ...................................................................................Arizona Department of Environmental Quality AQD............................................................................................................................... Air Quality Division CAM ....................................................................................................... Compliance Assurance Monitoring CFR................................................................................................................... Code of Federal Regulations CCPP................................................................................................................Combined Cycle Power Plant CLP .......................................................................................................................... Concentrate Leach Plant CO...................................................................................................................................... Carbon Monoxide CO2.........................................................................................................................................Carbon Dioxide FFDC .................................................................................................................. Fabric Filter Dust Collector hr .............................................................................................................................................................Hour lb ...........................................................................................................................................................Pound MFL ....................................................................................................................................... Mine for Leach MMBtu............................................................................................................ Million British Thermal Units MW ................................................................................................................................................Megawatts NSPS......................................................................................................New Source Performance Standards NOx ....................................................................................................................................... Nitrogen Oxide PSEU...........................................................................................................Pollutant Specific Emission Unit PLV............................................................................................................................. Pressure Leach Vessel PM.......................................................................................................................................Particulate Matter PM10 ........................................................................ Particulate Matter Nominally less than 10 Micrometers PSD ...................................................................................................Prevention of Significant Deterioration PTE ......................................................................................................................................Potential-to-Emit SO2 .......................................................................................................................................... Sulfur Dioxide SX/EW ....................................................................................... Solvent Extraction & Electrowinning Plant TPY.......................................................................................................................................... Tons per Year EPA ..........................................................................................................Environmental Protection Agency VOC ...................................................................................................................Volatile Organic Compound
Freeport-McMoRan Morenci, Inc.; Permit #42474 38 September 8, 2008 Technical Support Document
ANNEXURE I
TEST SCHEDULE
Freeport-McMoRan Morenci, Inc.; Permit #42474 39 September 8, 2008 Technical Support Document
TABLE 1: TESTING IN 1st, 3rd, & 5th YEAR
TABLE 2: TESTING IN 2nd & 4th YEAR
S. No.
EQUIPMENT CONTROL PROCESS PROCESS # PERMIT SECTION
1 IPC #1 Scrubber 001-005 2. IPC #2 FFDC 001-006 3. IPC #3 FFDC
Mining
001-250
Attachment B;
Section II 4. IOS #1/R1A & R1B Scrubber 001-018 5. Belt S10 to S11 BC #6 003-198 6. Fine Ore Pile to A1A BC #7 003-201 7. A1A to A2A BC #8 003-202 8. A1A to A2C BC #9 003-203 9. DC1/P8 transfer point FFDC 001-007
10. Belt R2 to Belt R3 BC #2 003-078 11. Belt R3 to Belt R4 BC #3 003-079 12. FB3/DC3, DC3/P5 FFDC 001-251 13. DC2/P9, P9/P10 FFDC 001-225 14. P2/P4 Transfer point FFDC 001-013 15. P4/P5 Transfer point FFDC 001-014 16. P5/P6 Transfer point FFDC
Material Transfer
001-015
Attachment B; Section III
17. Morenci Fine Crushing Line B
FFDC 002-030
18. Line C to Belt 3B to Belt 3
FFDC 002-031
19. Line C to Belt 3B to Belt 3A
FFDC
Morenci Concentrator
002-032
Attachment B; Section IV
20 Fine Crushing Scrubber #1 003-092 21 Fine Crushing Scrubber #8
Metcalf Building Scrubbers
003-090 Attachment B;
Section IV
22. PLV Scrubber Vent Scrubber Concentrate Leach Plant
014-239 Attachment B; Section IX
Freeport-McMoRan Morenci, Inc.; Permit #42474 40 September 8, 2008 Technical Support Document
TABLE 3: ONE TIME TESTING WITHIN 90 DAYS OF STARTUP
S. No.
EQUIPMENT CONTROL PROCESS PERMIT SECTION
1. Surge Pile/P2 Baghouse 001-012 2. DC2/P5 FFDC 001-225 3. IOS #2/R8 FFDC 001-228 4. R8/R9 FFDC 001-229 5. R9/R7 FFDC 001-230 6. R1B & R1A to R2 BC #1 003-077 7. R4/R5/R6 BC #4
Material Transfer
003-080
Attachment B; Section III
8. Apron Feeders Scrubber #3A
003-084
9. Coarse Ore Bin Scrubber #3C
003-082
10. Fine Crushing Scrubber #4 003-088 11. Fine Crushing Scrubber #5 003-089 12. Crusher Building Scrubber #6
Metcalf Building Scrubbers
003-085
Attachment B; Section IV
13. Morenci Fine Crushing Line C
FFDC 002-031
14. Morenci Fine Crushing Line D
FFDC
Morenci
Concentrator 002-032
Attachment B;
Section IV
S. No. EQUIPMENT CONTROL PROCESS PERMIT SECTION
1. Turbine #1
2. Turbine #1
3. Turbine #1/Boiler #1 combined Cycle
4. Turbine #2/Boiler #2 combined Cycle
Metcalf
Combined Cycle Power
Plant
Attachment B; Section V